AG公司云
【清静通告】微软4月清静更新多个产品高危误差通告
2021-04-14
一. 误差概述
4月14日 ，微软宣布4月清静更新补丁 ，修复了114个清静误差 ，涉及Windows、Office、Edge (Chromium-based) 、Visual Studio Code、Exchange Server、Visual Studio、Azure等普遍使用的产品 ，其中包括远程代码执行和权限提升等高危误差类型。
本月微软月度更新修复的误差中 ，严重水平为要害（Critical）的误差有19个 ，主要（Important）误差有88个。请相关用户尽快更新补丁举行防护。详细误差列表请参考附录。
参考链接：
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
二. 重点误差简述
凭证产品盛行度和误差主要性筛选出此次更新中包括影响较大的误差 ，请相关用户重点举行关注：
Exchange Server代码执行误差（CVE-2021-28480/CVE-2021-28481/CVE-2021-28482/CVE-2021-28483）：
攻击者可使用上述误差绕过Exchange身份验证 ，无需用户交互即可实现下令执行。 CVE-2021-28480和CVE-2021-28481的CVSS评分为9.8分 ，是未授权远程代码执行误差 ，未经身份验证的攻击者使用误差 ，可在内网的Exchange服务器举行横向扩散 ，可能造成蠕虫级误差的危害。
官方通告链接：
https://msrc.microsoft.com/update-guide/en-US/security-guidance/advisory/CVE-2021-28480
https://msrc.microsoft.com/update-guide/en-US/security-guidance/advisory/CVE-2021-28481
https://msrc.microsoft.com/update-guide/en-US/security-guidance/advisory/CVE-2021-28482
https://msrc.microsoft.com/update-guide/en-US/security-guidance/advisory/CVE-2021-28483
Win32k 权限提升误差（CVE-2021-28310）：
Win32k保存权限提升误差 ，攻击者使用此误差可在目的主机上以SYSTEM权限执行恣意代码。现在误差细节已果真 ，且已检测到在野攻击。
官方通告链接：
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-28310
Windows Hyper-V 清静功效绕过误差（CVE-2021-28444）：
攻击者可以绕过使用Router Guard设置的Hyper-V ，将Windows设置为中心人路由器 ，从而实现截获流量并修改数据包。
官方通告链接：
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-28444
Windows SMB信息泄露误差（CVE-2021-28324/CVE-2021-28325）：
Windows SMB保存两个信息泄露误差（CVE-2021-28324、CVE-2021-28325） ，攻击者可以会见内核空间中的内存内容。CVE-2021-28324无需身份验证 ，攻击者使用此误差可以未授权获取目的系统敏感信息。
官方通告链接：
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-28324
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-28325
三. 影响规模
以下为重点关注误差的受影响产品版本 ，其他误差影响产品规模请参阅官方通告链接。
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误差编号 |
受影响产品版本 |
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CVE-2021-28480 CVE-2021-28481 CVE-2021-28482 CVE-2021-28483 |
Microsoft Exchange Server 2019 Cumulative Update 8 |
|
CVE-2021-28310 |
Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for ARM64-based Systems Windows 10 Version 20H2 for 32-bit Systems Windows 10 Version 20H2 for x64-based Systems Windows Server, version 2004 (Server Core installation) Windows 10 Version 2004 for x64-based Systems Windows 10 Version 2004 for ARM64-based Systems Windows 10 Version 2004 for 32-bit Systems Windows Server, version 1909 (Server Core installation) Windows 10 Version 1909 for ARM64-based Systems Windows 10 Version 1909 for x64-based Systems Windows 10 Version 1909 for 32-bit Systems Windows Server 2019 (Server Core installation) Windows Server 2019 Windows 10 Version 1809 for ARM64-based Systems Windows 10 Version 1809 for x64-based Systems Windows 10 Version 1809 for 32-bit Systems Windows 10 Version 1803 for x64-based Systems Windows 10 Version 1803 for 32-bit Systems |
|
CVE-2021-28444 |
Windows Server 2012 R2 (Server Core installation) Windows Server 2012 R2 Windows 8.1 for x64-based systems Windows Server 2016 (Server Core installation) Windows Server 2016 Windows 10 Version 1607 for x64-based Systems Windows 10 for x64-based Systems Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for x64-based Systems Windows Server, version 2004 (Server Core installation) Windows 10 Version 2004 for x64-based Systems Windows Server, version 1909 (Server Core installation) Windows 10 Version 1909 for x64-based Systems Windows Server 2019 (Server Core installation) Windows Server 2019 Windows 10 Version 1809 for x64-based Systems Windows 10 Version 1803 for x64-based Systems |
|
CVE-2021-28324 |
Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for ARM64-based Systems Windows 10 Version 20H2 for 32-bit Systems Windows 10 Version 20H2 for x64-based Systems Windows Server, version 2004 (Server Core installation) Windows 10 Version 2004 for x64-based Systems Windows 10 Version 2004 for ARM64-based Systems Windows 10 Version 2004 for 32-bit Systems |
|
CVE-2021-28325 |
Windows 10 Version 2004 for 32-bit Systems Windows Server, version 1909 (Server Core installation) Windows 10 Version 1909 for ARM64-based Systems Windows 10 Version 1909 for x64-based Systems Windows 10 Version 1909 for 32-bit Systems Windows Server 2019 (Server Core installation) Windows Server 2019 Windows 10 Version 1809 for ARM64-based Systems Windows 10 Version 1809 for x64-based Systems Windows 10 Version 1809 for 32-bit Systems Windows 10 Version 1803 for x64-based Systems Windows 10 Version 1803 for 32-bit Systems Windows 10 for 32-bit Systems Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for ARM64-based Systems Windows 10 Version 20H2 for 32-bit Systems Windows 10 Version 20H2 for x64-based Systems Windows Server, version 2004 (Server Core installation) Windows 10 Version 2004 for x64-based Systems Windows 10 Version 2004 for ARM64-based Systems Windows Server 2012 R2 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 (Server Core installation) Windows Server 2012 Windows RT 8.1 Windows 8.1 for x64-based systems Windows 8.1 for 32-bit systems Windows Server 2016 (Server Core installation) Windows Server 2016 Windows 10 Version 1607 for x64-based Systems Windows 10 Version 1607 for 32-bit Systems Windows 10 for x64-based Systems |
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四. 误差防护
4.1 补丁更新
现在微软官方已针对受支持的产品版本宣布了修复以上误差的清静补丁 ，强烈建议受影响用户尽快装置补丁举行防护 ，官方下载链接：
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
注：由于网络问题、盘算机情形问题等缘故原由 ，Windows Update的补丁更新可能泛起失败。用户在装置补丁后 ，应实时检查补丁是否乐成更新。
右键点击Windows图标 ，选择“设置(N)” ，选择“更新和清静”-“Windows更新” ，审查该页面上的提醒信息 ，也可点击“审查更新历史纪录”审查历史更新情形。
针对未乐成装置的更新 ，可点击更新名称跳转到微软官方下载页面 ，建议用户点击该页面上的链接 ，转到“Microsoft更新目录”网站下载自力程序包并装置。
